package com.hk.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hk.reggie.common.BaseContext;
import com.hk.reggie.common.CustomException;
import com.hk.reggie.entity.*;
import com.hk.reggie.mapper.OrderMapper;
import com.hk.reggie.service.*;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {

    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailService orderDetailService;

    /**
     * 用户下单
     * @param orders
     */
    @Transactional
    public void submit(Orders orders) {
        // 获得当前用户id
        Long userId = BaseContext.getCurrentId();

        //查询当前用户的购物车数据
        QueryWrapper<ShoppingCart> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("user_id", userId);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(queryWrapper);

        if(shoppingCarts == null || shoppingCarts.size() == 0){
            throw new CustomException("购物车为空，不能下单");
        }

        //查询用户数据
        User user = userService.getById(userId);

        //查询地址数据
        AddressBook addressBook = addressBookService.getById(orders.getAddressBookId());
        if(addressBook == null ){
            throw new CustomException("地址信息有误，不能下单");
        }

        long orderId = IdWorker.getId(); //订单号

        AtomicInteger amount = new AtomicInteger(0);

        List<OrderDetail> orderDetails = shoppingCarts.stream().map((item)->{
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(item,orderDetail);
            orderDetail.setOrderId(orderId);
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());

        //向订单表插入数据
        orders.setNumber(String.valueOf(orderId));
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));
        orders.setUserId(userId);
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));

        this.save(orders);

        //向订单明细表插入数据
        orderDetailService.saveBatch(orderDetails);

        // 清空购物车
        shoppingCartService.clean();
    }
}















